Amazon policy change?

Has Amazon changed their policy on free ebooks? I had an email on October 26th saying that my ebook 'The Ray Hunters,' the price of which I'd set to 'free' had passed all the requirements for distribution. It still isn't showing on Amazon, it's now well beyond the 2-4 weeks time threshold for being available on retail sites. Have Amazon changed the policy on allowing ebooks to be available for free?